Latest Capgemini Aptitude Question SOLUTION: Two trains A and B start simultaneously in the opposite direction from two points A and B arrive at their destinations 9 and 4 hours respectively after their meeting each other. At

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(#M40029949) CAPGEMINI Numerical Ability question Aptitute Time,Speed & Distance Keep an EYE

Two trains A and B start simultaneously in the opposite direction from two points A and B arrive at their destinations 9 and 4 hours respectively after their meeting each other. At what rate dose the second train B travels if the first train travels at 80 km per hour. Option
option
A)60 km/h
B)100 km/h
C)120 km/h
D)80 km/h

Asked In Capgemini ashutosh patra (10 years ago)

Solved Kiran Krishna Hati Read Solution (12)

Is this Puzzle helpful?   (113)   (48) Submit Your Solution Time Distance and Speed

Read Solution (12) :

Kiran Krishna Hati  (10 years ago)

If two trains (or bodies) start at the same time from points A and B towards each other and after
crossing they take a and b sec in reaching B and A respectively, then
(A's speed) : (B’s speed) = √b:√a.
hence the answer 120 km/hr

Is this solution Helpfull? Yes (41) | No (7)  

pintu  (10 years ago)

speed of a/speed of b=root(4)/root(9),then solving
speed of b=(80* root 9)/root 4
=120km/hr.

Is this solution Helpfull? Yes (17) | No (4)  

paulprashanth  (10 years ago)

120
80:x::2:3
2x=240
x=120

Is this solution Helpfull? Yes (15) | No (2)  

shiny amulya  (10 years ago)

Let t be the time after the departure of trains till they met.let speed of train B be x
for train A,80*t is distance travelled from starting to till it met train B
for train be distance is x*t
x*t distance is travelled by train A in 9hours
80*t is travelled by train B in 4 hours
so x*t=80*9
and 80*t=4*x
dividing equations we get
x=120,which is speed of train B

Is this solution Helpfull? Yes (8) | No (5)  

ashutosh patra  (10 years ago)

pintu...how did that formula come from...can you explain in detail?

Is this solution Helpfull? Yes (6) | No (1)  

Mayank Rathore  (7 years ago)

If two trains (or bodies) start at the same time from points A and B towards each other and after
crossing they take a and b sec in reaching B and A respectively, then
(A's speed) : (B’s speed) = √b:√a.
80 : X = 2 : 3
then
X = 120
hence the answer 120 km/hr

It is under Formulas for finding Speed, Time and Distance @ indiabix
http://www.indiabix.com/aptitude/problems-on-trains/formulas

Is this solution Helpfull? Yes (3) | No   

baibhav jena  (10 years ago)

c)120km/hr

Is this solution Helpfull? Yes (2) | No (5)  

shweta  (9 years ago)

F=32+B , if R=0 ……..(1) & M=25+S, if R=0,……….(2)
B=R+6=> B=6 if R=0……….(3) & M=F-3………(4)
S=?,if R=0
From(1) F=32+6=38, from(4) M=38-3=35
From(2) S=M-25=> S=35=25=10
ans=10yrs

Is this solution Helpfull? Yes | No (1)  

Gaurav Singh  (7 years ago)

let train A runs t time befor meeting point starting from point A to B
nd train B runs t time befor meeting point starting from point B to A
and after meating A runs 9 hrs nd B runs 4 hrs

t 9
A-------------|------------>B

4 t
A

Is this solution Helpfull? Yes | No   

Gaurav Singh  (7 years ago)

ohh shit yr mera pura ans display nhi hua

t/4=9/t t^2=36, t=6
6+9= 15 4+6=10
train A distance 15*80 =1200 km
same distance covered by B
so speed of train b is 1200/10 = 120 km/hr

Is this solution Helpfull? Yes | No   

samuel  (7 years ago)

A & B start at same time towards each other. After meeting each other, they reach their destinations after ‘a’ and ‘b’ hrs respectively.A & B start at same time towards each other. After meeting each other, they reach their destinations after ‘a’ and ‘b’ hrs respectively.A & B start at same time towards each other. After meeting each other, they reach their destinations after ‘a’ and ‘b’ hrs respectively.


A’s Speed : B’s Speed = √b : √a

Is this solution Helpfull? Yes | No   

Archana mishra  (5 years ago)

80:x::2:3
2x=240
x=120

Is this solution Helpfull? Yes | No   

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